Dating a welshman
The genetic tests suggested that between 50% and 100% of the indigenous population of what was to become England was wiped out.
Research for a BBC programme on the Vikings suggested a possible strong link between the Celts and Basques, dating back tens of thousands of years.
In two recently published books, Blood of the Isles, by Brian Sykes and The Origins of the British, by Stephen Oppenheimer, both authors state that according to genetic evidence, most Welsh people, like most Britons, descend from the Iberian Peninsula in Southwest Europe, as a result of different migrations that took place during the Mesolithic and the Neolithic eras, and which laid the foundations for the present-day populations in the British Isles, indicating an ancient relationship among the populations of Atlantic Europe.
The names "Wales" and "Welsh" are traced to the Proto-Germanic word "Walhaz" meaning "foreigner", "stranger", "Roman", "Romance-speaker", or "Celtic-speaker" which was used by the ancient Germanic peoples to describe inhabitants of the former Roman Empire, who were largely romanised and spoke Latin or Celtic languages.The name of the region in northern England now known as Cumbria is derived from the same root.Only gradually did Cymru (the land) and Cymry (the people) come to supplant Brython.Others hold that the close similarity between the Goidelic and Brythonic branches, and their sharing of Late Bronze Age and Early Iron Age terminology with their continental relatives, point to a more recent introduction of Indo-European languages (or close communication), with Proto-Celtic itself unlikely to have existed before the end of the 2nd millennium BC at the earliest.The genetic evidence in this case would show that the change to Celtic languages in Britain may have occurred as a cultural shift rather than through migration as was previously supposed.